Transformation of weed communities under the evolution of agricultural technologies

The article analyzes the dynamics of weed species composition in the agrocenoses of the Ukrainian Steppe under technogenic pressure caused by changes in farming systems and herbicide load. It was established that technobiogenic transformation of agroecosystems induces associative variability in weed phytocoenoses, which is manifested in shifts of dominant species and their resistance to control measures. A historical and analytical survey of weed species composition was conducted using Raunkiaer’s method for the period 1958-2025. An optimal agrotechnological model for weed management was proposed, taking into account crop structure, soil tillage methods, and herbicide application intensity